Tesla officially won the bid in July and signed the grid connection deal on Sept. 29.

The company managed to connect the giant lithium ion battery well within the stipulated timeframe and now testing is set to begin to ensure the Powerback system met requirements set forth by the Australian Energy Market Operator and South Australian Government requirements, CNBC reported.

“Tesla’s Powerpack will charge using renewable energy from the Hornsdale Wind Farm and then deliver electricity during peak hours to help maintain the reliable operation of South Australia’s electrical infrastructure,” Tesla said, per Digital Trends, adding that the giant battery “will further transform the state’s movement towards renewable energy and see an advancement of a resilient and modern grid.”

According to ABC, the battery can power about 30,000 homes for about an hour and forms part of state Premier Jay Weatherill’s $550 million energy plan that is designed to alleviate energy supply shortfalls.

“While others are just talking, we are delivering our energy plan, making South Australia more self-sufficient, and providing back up power and more affordable energy for South Australians this summer,” said Weatherill per the New York Post.